1 /* $NetBSD: scp.c,v 1.9 2013/11/08 19:18:25 christos Exp $ */ 2 /* $OpenBSD: scp.c,v 1.178 2013/06/22 06:31:57 djm Exp $ */ 3 /* 4 * scp - secure remote copy. This is basically patched BSD rcp which 5 * uses ssh to do the data transfer (instead of using rcmd). 6 * 7 * NOTE: This version should NOT be suid root. (This uses ssh to 8 * do the transfer and ssh has the necessary privileges.) 9 * 10 * 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi> 11 * 12 * As far as I am concerned, the code I have written for this software 13 * can be used freely for any purpose. Any derived versions of this 14 * software must be clearly marked as such, and if the derived work is 15 * incompatible with the protocol description in the RFC file, it must be 16 * called by a name other than "ssh" or "Secure Shell". 17 */ 18 /* 19 * Copyright (c) 1999 Theo de Raadt. All rights reserved. 20 * Copyright (c) 1999 Aaron Campbell. All rights reserved. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the above copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 32 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 33 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 34 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 35 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 37 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 38 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 39 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 40 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 41 */ 42 43 /* 44 * Parts from: 45 * 46 * Copyright (c) 1983, 1990, 1992, 1993, 1995 47 * The Regents of the University of California. All rights reserved. 48 * 49 * Redistribution and use in source and binary forms, with or without 50 * modification, are permitted provided that the following conditions 51 * are met: 52 * 1. Redistributions of source code must retain the above copyright 53 * notice, this list of conditions and the following disclaimer. 54 * 2. Redistributions in binary form must reproduce the above copyright 55 * notice, this list of conditions and the following disclaimer in the 56 * documentation and/or other materials provided with the distribution. 57 * 3. Neither the name of the University nor the names of its contributors 58 * may be used to endorse or promote products derived from this software 59 * without specific prior written permission. 60 * 61 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 62 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 63 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 64 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 65 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 66 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 67 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 68 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 69 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 70 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 71 * SUCH DAMAGE. 72 * 73 */ 74 75 #include "includes.h" 76 __RCSID("$NetBSD: scp.c,v 1.9 2013/11/08 19:18:25 christos Exp $"); 77 #include <sys/param.h> 78 #include <sys/types.h> 79 #include <sys/poll.h> 80 #include <sys/wait.h> 81 #include <sys/stat.h> 82 #include <sys/time.h> 83 #include <sys/uio.h> 84 85 #include <ctype.h> 86 #include <dirent.h> 87 #include <errno.h> 88 #include <fcntl.h> 89 #include <pwd.h> 90 #include <signal.h> 91 #include <stdarg.h> 92 #include <stdio.h> 93 #include <stdlib.h> 94 #include <string.h> 95 #include <time.h> 96 #include <unistd.h> 97 #include <vis.h> 98 99 #include "xmalloc.h" 100 #include "atomicio.h" 101 #include "pathnames.h" 102 #include "log.h" 103 #include "misc.h" 104 #include "progressmeter.h" 105 106 #define COPY_BUFLEN 16384 107 108 int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout); 109 int do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout); 110 111 static char dot[] = "."; 112 static char empty[] = ""; 113 114 /* Struct for addargs */ 115 arglist args; 116 arglist remote_remote_args; 117 118 /* Bandwidth limit */ 119 long long limit_kbps = 0; 120 struct bwlimit bwlimit; 121 122 /* Name of current file being transferred. */ 123 char *curfile; 124 125 /* This is set to non-zero to enable verbose mode. */ 126 int verbose_mode = 0; 127 128 /* This is set to zero if the progressmeter is not desired. */ 129 int showprogress = 1; 130 131 /* 132 * This is set to non-zero if remote-remote copy should be piped 133 * through this process. 134 */ 135 int throughlocal = 0; 136 137 /* This is the program to execute for the secured connection. ("ssh" or -S) */ 138 #ifdef RESCUEDIR 139 const char *ssh_program = RESCUEDIR "/ssh"; 140 #else 141 const char *ssh_program = _PATH_SSH_PROGRAM; 142 #endif 143 144 /* This is used to store the pid of ssh_program */ 145 pid_t do_cmd_pid = -1; 146 147 __dead static void 148 killchild(int signo) 149 { 150 if (do_cmd_pid > 1) { 151 kill(do_cmd_pid, signo ? signo : SIGTERM); 152 waitpid(do_cmd_pid, NULL, 0); 153 } 154 155 if (signo) 156 _exit(1); 157 exit(1); 158 } 159 160 static void 161 suspchild(int signo) 162 { 163 int status; 164 165 if (do_cmd_pid > 1) { 166 kill(do_cmd_pid, signo); 167 while (waitpid(do_cmd_pid, &status, WUNTRACED) == -1 && 168 errno == EINTR) 169 ; 170 kill(getpid(), SIGSTOP); 171 } 172 } 173 174 static int 175 do_local_cmd(arglist *a) 176 { 177 u_int i; 178 int status; 179 pid_t pid; 180 181 if (a->num == 0) 182 fatal("do_local_cmd: no arguments"); 183 184 if (verbose_mode) { 185 fprintf(stderr, "Executing:"); 186 for (i = 0; i < a->num; i++) 187 fprintf(stderr, " %s", a->list[i]); 188 fprintf(stderr, "\n"); 189 } 190 if ((pid = fork()) == -1) 191 fatal("do_local_cmd: fork: %s", strerror(errno)); 192 193 if (pid == 0) { 194 execvp(a->list[0], a->list); 195 perror(a->list[0]); 196 exit(1); 197 } 198 199 do_cmd_pid = pid; 200 signal(SIGTERM, killchild); 201 signal(SIGINT, killchild); 202 signal(SIGHUP, killchild); 203 204 while (waitpid(pid, &status, 0) == -1) 205 if (errno != EINTR) 206 fatal("do_local_cmd: waitpid: %s", strerror(errno)); 207 208 do_cmd_pid = -1; 209 210 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 211 return (-1); 212 213 return (0); 214 } 215 216 /* 217 * This function executes the given command as the specified user on the 218 * given host. This returns < 0 if execution fails, and >= 0 otherwise. This 219 * assigns the input and output file descriptors on success. 220 */ 221 222 int 223 do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout) 224 { 225 int pin[2], pout[2], reserved[2]; 226 227 if (verbose_mode) 228 fprintf(stderr, 229 "Executing: program %s host %s, user %s, command %s\n", 230 ssh_program, host, 231 remuser ? remuser : "(unspecified)", cmd); 232 233 /* 234 * Reserve two descriptors so that the real pipes won't get 235 * descriptors 0 and 1 because that will screw up dup2 below. 236 */ 237 if (pipe(reserved) < 0) 238 fatal("pipe: %s", strerror(errno)); 239 240 /* Create a socket pair for communicating with ssh. */ 241 if (pipe(pin) < 0) 242 fatal("pipe: %s", strerror(errno)); 243 if (pipe(pout) < 0) 244 fatal("pipe: %s", strerror(errno)); 245 246 /* Free the reserved descriptors. */ 247 close(reserved[0]); 248 close(reserved[1]); 249 250 signal(SIGTSTP, suspchild); 251 signal(SIGTTIN, suspchild); 252 signal(SIGTTOU, suspchild); 253 254 /* Fork a child to execute the command on the remote host using ssh. */ 255 do_cmd_pid = fork(); 256 if (do_cmd_pid == 0) { 257 /* Child. */ 258 close(pin[1]); 259 close(pout[0]); 260 dup2(pin[0], 0); 261 dup2(pout[1], 1); 262 close(pin[0]); 263 close(pout[1]); 264 265 replacearg(&args, 0, "%s", ssh_program); 266 if (remuser != NULL) { 267 addargs(&args, "-l"); 268 addargs(&args, "%s", remuser); 269 } 270 addargs(&args, "--"); 271 addargs(&args, "%s", host); 272 addargs(&args, "%s", cmd); 273 274 execvp(ssh_program, args.list); 275 perror(ssh_program); 276 exit(1); 277 } else if (do_cmd_pid == -1) { 278 fatal("fork: %s", strerror(errno)); 279 } 280 /* Parent. Close the other side, and return the local side. */ 281 close(pin[0]); 282 *fdout = pin[1]; 283 close(pout[1]); 284 *fdin = pout[0]; 285 signal(SIGTERM, killchild); 286 signal(SIGINT, killchild); 287 signal(SIGHUP, killchild); 288 return 0; 289 } 290 291 /* 292 * This functions executes a command simlar to do_cmd(), but expects the 293 * input and output descriptors to be setup by a previous call to do_cmd(). 294 * This way the input and output of two commands can be connected. 295 */ 296 int 297 do_cmd2(char *host, char *remuser, char *cmd, int fdin, int fdout) 298 { 299 pid_t pid; 300 int status; 301 302 if (verbose_mode) 303 fprintf(stderr, 304 "Executing: 2nd program %s host %s, user %s, command %s\n", 305 ssh_program, host, 306 remuser ? remuser : "(unspecified)", cmd); 307 308 /* Fork a child to execute the command on the remote host using ssh. */ 309 pid = fork(); 310 if (pid == 0) { 311 dup2(fdin, 0); 312 dup2(fdout, 1); 313 314 replacearg(&args, 0, "%s", ssh_program); 315 if (remuser != NULL) { 316 addargs(&args, "-l"); 317 addargs(&args, "%s", remuser); 318 } 319 addargs(&args, "--"); 320 addargs(&args, "%s", host); 321 addargs(&args, "%s", cmd); 322 323 execvp(ssh_program, args.list); 324 perror(ssh_program); 325 exit(1); 326 } else if (pid == -1) { 327 fatal("fork: %s", strerror(errno)); 328 } 329 while (waitpid(pid, &status, 0) == -1) 330 if (errno != EINTR) 331 fatal("do_cmd2: waitpid: %s", strerror(errno)); 332 return 0; 333 } 334 335 typedef struct { 336 size_t cnt; 337 char *buf; 338 } BUF; 339 340 BUF *allocbuf(BUF *, int, int); 341 __dead static void lostconn(int); 342 int okname(char *); 343 void run_err(const char *,...) __printflike(1, 2); 344 void verifydir(char *); 345 346 struct passwd *pwd; 347 uid_t userid; 348 int errs, remin, remout; 349 int pflag, iamremote, iamrecursive, targetshouldbedirectory; 350 351 #define CMDNEEDS 64 352 char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ 353 354 int response(void); 355 void rsource(char *, struct stat *); 356 void sink(int, char *[]); 357 void source(int, char *[]); 358 static void tolocal(int, char *[]); 359 static void toremote(char *, int, char *[]); 360 __dead static void usage(void); 361 362 int 363 main(int argc, char **argv) 364 { 365 int ch, fflag, tflag, status, n; 366 char *targ, **newargv; 367 const char *errstr; 368 extern char *optarg; 369 extern int optind; 370 371 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 372 sanitise_stdfd(); 373 374 /* Copy argv, because we modify it */ 375 newargv = xcalloc(MAX(argc + 1, 1), sizeof(*newargv)); 376 for (n = 0; n < argc; n++) 377 newargv[n] = xstrdup(argv[n]); 378 argv = newargv; 379 380 memset(&args, '\0', sizeof(args)); 381 memset(&remote_remote_args, '\0', sizeof(remote_remote_args)); 382 args.list = remote_remote_args.list = NULL; 383 addargs(&args, "%s", ssh_program); 384 addargs(&args, "-x"); 385 addargs(&args, "-oForwardAgent=no"); 386 addargs(&args, "-oPermitLocalCommand=no"); 387 addargs(&args, "-oClearAllForwardings=yes"); 388 389 fflag = tflag = 0; 390 while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q12346S:o:F:")) != -1) 391 switch (ch) { 392 /* User-visible flags. */ 393 case '1': 394 case '2': 395 case '4': 396 case '6': 397 case 'C': 398 addargs(&args, "-%c", ch); 399 addargs(&remote_remote_args, "-%c", ch); 400 break; 401 case '3': 402 throughlocal = 1; 403 break; 404 case 'o': 405 case 'c': 406 case 'i': 407 case 'F': 408 addargs(&remote_remote_args, "-%c", ch); 409 addargs(&remote_remote_args, "%s", optarg); 410 addargs(&args, "-%c", ch); 411 addargs(&args, "%s", optarg); 412 break; 413 case 'P': 414 addargs(&remote_remote_args, "-p"); 415 addargs(&remote_remote_args, "%s", optarg); 416 addargs(&args, "-p"); 417 addargs(&args, "%s", optarg); 418 break; 419 case 'B': 420 addargs(&remote_remote_args, "-oBatchmode=yes"); 421 addargs(&args, "-oBatchmode=yes"); 422 break; 423 case 'l': 424 limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024, 425 &errstr); 426 if (errstr != NULL) 427 usage(); 428 limit_kbps *= 1024; /* kbps */ 429 bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN); 430 break; 431 case 'p': 432 pflag = 1; 433 break; 434 case 'r': 435 iamrecursive = 1; 436 break; 437 case 'S': 438 ssh_program = xstrdup(optarg); 439 break; 440 case 'v': 441 addargs(&args, "-v"); 442 addargs(&remote_remote_args, "-v"); 443 verbose_mode = 1; 444 break; 445 case 'q': 446 addargs(&args, "-q"); 447 addargs(&remote_remote_args, "-q"); 448 showprogress = 0; 449 break; 450 451 /* Server options. */ 452 case 'd': 453 targetshouldbedirectory = 1; 454 break; 455 case 'f': /* "from" */ 456 iamremote = 1; 457 fflag = 1; 458 break; 459 case 't': /* "to" */ 460 iamremote = 1; 461 tflag = 1; 462 break; 463 default: 464 usage(); 465 } 466 argc -= optind; 467 argv += optind; 468 469 if ((pwd = getpwuid(userid = getuid())) == NULL) 470 fatal("unknown user %u", (u_int) userid); 471 472 if (!isatty(STDOUT_FILENO)) 473 showprogress = 0; 474 475 remin = STDIN_FILENO; 476 remout = STDOUT_FILENO; 477 478 if (fflag) { 479 /* Follow "protocol", send data. */ 480 (void) response(); 481 source(argc, argv); 482 exit(errs != 0); 483 } 484 if (tflag) { 485 /* Receive data. */ 486 sink(argc, argv); 487 exit(errs != 0); 488 } 489 if (argc < 2) 490 usage(); 491 if (argc > 2) 492 targetshouldbedirectory = 1; 493 494 remin = remout = -1; 495 do_cmd_pid = -1; 496 /* Command to be executed on remote system using "ssh". */ 497 (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s", 498 verbose_mode ? " -v" : "", 499 iamrecursive ? " -r" : "", pflag ? " -p" : "", 500 targetshouldbedirectory ? " -d" : ""); 501 502 (void) signal(SIGPIPE, lostconn); 503 504 if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ 505 toremote(targ, argc, argv); 506 else { 507 if (targetshouldbedirectory) 508 verifydir(argv[argc - 1]); 509 tolocal(argc, argv); /* Dest is local host. */ 510 } 511 /* 512 * Finally check the exit status of the ssh process, if one was forked 513 * and no error has occurred yet 514 */ 515 if (do_cmd_pid != -1 && errs == 0) { 516 if (remin != -1) 517 (void) close(remin); 518 if (remout != -1) 519 (void) close(remout); 520 if (waitpid(do_cmd_pid, &status, 0) == -1) 521 errs = 1; 522 else { 523 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 524 errs = 1; 525 } 526 } 527 exit(errs != 0); 528 } 529 530 /* Callback from atomicio6 to update progress meter and limit bandwidth */ 531 static int 532 scpio(void *_cnt, size_t s) 533 { 534 off_t *cnt = (off_t *)_cnt; 535 536 *cnt += s; 537 if (limit_kbps > 0) 538 bandwidth_limit(&bwlimit, s); 539 return 0; 540 } 541 542 static int 543 do_times(int fd, int verb, const struct stat *sb) 544 { 545 /* strlen(2^64) == 20; strlen(10^6) == 7 */ 546 char buf[(20 + 7 + 2) * 2 + 2]; 547 548 (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", 549 (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), 550 (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); 551 if (verb) { 552 fprintf(stderr, "File mtime %lld atime %lld\n", 553 (long long)sb->st_mtime, (long long)sb->st_atime); 554 fprintf(stderr, "Sending file timestamps: %s", buf); 555 } 556 (void) atomicio(vwrite, fd, buf, strlen(buf)); 557 return (response()); 558 } 559 560 void 561 toremote(char *targ, int argc, char **argv) 562 { 563 char *bp, *host, *src, *suser, *thost, *tuser, *arg; 564 arglist alist; 565 int i; 566 u_int j; 567 568 memset(&alist, '\0', sizeof(alist)); 569 alist.list = NULL; 570 571 *targ++ = 0; 572 if (*targ == 0) 573 targ = dot; 574 575 arg = xstrdup(argv[argc - 1]); 576 if ((thost = strrchr(arg, '@'))) { 577 /* user@host */ 578 *thost++ = 0; 579 tuser = arg; 580 if (*tuser == '\0') 581 tuser = NULL; 582 } else { 583 thost = arg; 584 tuser = NULL; 585 } 586 587 if (tuser != NULL && !okname(tuser)) { 588 free(arg); 589 return; 590 } 591 592 for (i = 0; i < argc - 1; i++) { 593 src = colon(argv[i]); 594 if (src && throughlocal) { /* extended remote to remote */ 595 *src++ = 0; 596 if (*src == 0) 597 src = dot; 598 host = strrchr(argv[i], '@'); 599 if (host) { 600 *host++ = 0; 601 host = cleanhostname(host); 602 suser = argv[i]; 603 if (*suser == '\0') 604 suser = pwd->pw_name; 605 else if (!okname(suser)) 606 continue; 607 } else { 608 host = cleanhostname(argv[i]); 609 suser = NULL; 610 } 611 xasprintf(&bp, "%s -f %s%s", cmd, 612 *src == '-' ? "-- " : "", src); 613 if (do_cmd(host, suser, bp, &remin, &remout) < 0) 614 exit(1); 615 free(bp); 616 host = cleanhostname(thost); 617 xasprintf(&bp, "%s -t %s%s", cmd, 618 *targ == '-' ? "-- " : "", targ); 619 if (do_cmd2(host, tuser, bp, remin, remout) < 0) 620 exit(1); 621 free(bp); 622 (void) close(remin); 623 (void) close(remout); 624 remin = remout = -1; 625 } else if (src) { /* standard remote to remote */ 626 freeargs(&alist); 627 addargs(&alist, "%s", ssh_program); 628 addargs(&alist, "-x"); 629 addargs(&alist, "-oClearAllForwardings=yes"); 630 addargs(&alist, "-n"); 631 for (j = 0; j < remote_remote_args.num; j++) { 632 addargs(&alist, "%s", 633 remote_remote_args.list[j]); 634 } 635 *src++ = 0; 636 if (*src == 0) 637 src = dot; 638 host = strrchr(argv[i], '@'); 639 640 if (host) { 641 *host++ = 0; 642 host = cleanhostname(host); 643 suser = argv[i]; 644 if (*suser == '\0') 645 suser = pwd->pw_name; 646 else if (!okname(suser)) 647 continue; 648 addargs(&alist, "-l"); 649 addargs(&alist, "%s", suser); 650 } else { 651 host = cleanhostname(argv[i]); 652 } 653 addargs(&alist, "--"); 654 addargs(&alist, "%s", host); 655 addargs(&alist, "%s", cmd); 656 addargs(&alist, "%s", src); 657 addargs(&alist, "%s%s%s:%s", 658 tuser ? tuser : "", tuser ? "@" : "", 659 thost, targ); 660 if (do_local_cmd(&alist) != 0) 661 errs = 1; 662 } else { /* local to remote */ 663 if (remin == -1) { 664 xasprintf(&bp, "%s -t %s%s", cmd, 665 *targ == '-' ? "-- " : "", targ); 666 host = cleanhostname(thost); 667 if (do_cmd(host, tuser, bp, &remin, 668 &remout) < 0) 669 exit(1); 670 if (response() < 0) 671 exit(1); 672 free(bp); 673 } 674 source(1, argv + i); 675 } 676 } 677 free(arg); 678 } 679 680 static void 681 tolocal(int argc, char **argv) 682 { 683 char *bp, *host, *src, *suser; 684 arglist alist; 685 int i; 686 687 memset(&alist, '\0', sizeof(alist)); 688 alist.list = NULL; 689 690 for (i = 0; i < argc - 1; i++) { 691 if (!(src = colon(argv[i]))) { /* Local to local. */ 692 freeargs(&alist); 693 addargs(&alist, "%s", _PATH_CP); 694 if (iamrecursive) 695 addargs(&alist, "-r"); 696 if (pflag) 697 addargs(&alist, "-p"); 698 addargs(&alist, "--"); 699 addargs(&alist, "%s", argv[i]); 700 addargs(&alist, "%s", argv[argc-1]); 701 if (do_local_cmd(&alist)) 702 ++errs; 703 continue; 704 } 705 *src++ = 0; 706 if (*src == 0) 707 src = dot; 708 if ((host = strrchr(argv[i], '@')) == NULL) { 709 host = argv[i]; 710 suser = NULL; 711 } else { 712 *host++ = 0; 713 suser = argv[i]; 714 if (*suser == '\0') 715 suser = pwd->pw_name; 716 } 717 host = cleanhostname(host); 718 xasprintf(&bp, "%s -f %s%s", 719 cmd, *src == '-' ? "-- " : "", src); 720 if (do_cmd(host, suser, bp, &remin, &remout) < 0) { 721 free(bp); 722 ++errs; 723 continue; 724 } 725 free(bp); 726 sink(1, argv + argc - 1); 727 (void) close(remin); 728 remin = remout = -1; 729 } 730 } 731 732 void 733 source(int argc, char **argv) 734 { 735 struct stat stb; 736 static BUF buffer; 737 BUF *bp; 738 off_t i, statbytes; 739 size_t amt; 740 int fd = -1, haderr, indx; 741 char *last, *name, buf[16384], encname[MAXPATHLEN]; 742 int len; 743 744 for (indx = 0; indx < argc; ++indx) { 745 fd = -1; 746 name = argv[indx]; 747 statbytes = 0; 748 len = strlen(name); 749 while (len > 1 && name[len-1] == '/') 750 name[--len] = '\0'; 751 if ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0) 752 goto syserr; 753 if (strchr(name, '\n') != NULL) { 754 strvisx(encname, name, len, VIS_NL); 755 name = encname; 756 } 757 if (fstat(fd, &stb) < 0) { 758 syserr: run_err("%s: %s", name, strerror(errno)); 759 goto next; 760 } 761 if (stb.st_size < 0) { 762 run_err("%s: %s", name, "Negative file size"); 763 goto next; 764 } 765 unset_nonblock(fd); 766 switch (stb.st_mode & S_IFMT) { 767 case S_IFREG: 768 break; 769 case S_IFDIR: 770 if (iamrecursive) { 771 rsource(name, &stb); 772 goto next; 773 } 774 /* FALLTHROUGH */ 775 default: 776 run_err("%s: not a regular file", name); 777 goto next; 778 } 779 if ((last = strrchr(name, '/')) == NULL) 780 last = name; 781 else 782 ++last; 783 curfile = last; 784 if (pflag) { 785 if (do_times(remout, verbose_mode, &stb) < 0) 786 goto next; 787 } 788 #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) 789 snprintf(buf, sizeof buf, "C%04o %lld %s\n", 790 (u_int) (stb.st_mode & FILEMODEMASK), 791 (long long)stb.st_size, last); 792 if (verbose_mode) { 793 fprintf(stderr, "Sending file modes: %s", buf); 794 } 795 (void) atomicio(vwrite, remout, buf, strlen(buf)); 796 if (response() < 0) 797 goto next; 798 if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) { 799 next: if (fd != -1) { 800 (void) close(fd); 801 fd = -1; 802 } 803 continue; 804 } 805 if (showprogress) 806 start_progress_meter(curfile, stb.st_size, &statbytes); 807 set_nonblock(remout); 808 for (haderr = i = 0; i < stb.st_size; i += bp->cnt) { 809 amt = bp->cnt; 810 if (i + (off_t)amt > stb.st_size) 811 amt = stb.st_size - i; 812 if (!haderr) { 813 if (atomicio(read, fd, bp->buf, amt) != amt) 814 haderr = errno; 815 } 816 /* Keep writing after error to retain sync */ 817 if (haderr) { 818 (void)atomicio(vwrite, remout, bp->buf, amt); 819 continue; 820 } 821 if (atomicio6(vwrite, remout, bp->buf, amt, scpio, 822 &statbytes) != amt) 823 haderr = errno; 824 } 825 unset_nonblock(remout); 826 if (showprogress) 827 stop_progress_meter(); 828 829 if (fd != -1) { 830 if (close(fd) < 0 && !haderr) 831 haderr = errno; 832 fd = -1; 833 } 834 if (!haderr) 835 (void) atomicio(vwrite, remout, empty, 1); 836 else 837 run_err("%s: %s", name, strerror(haderr)); 838 (void) response(); 839 } 840 } 841 842 void 843 rsource(char *name, struct stat *statp) 844 { 845 DIR *dirp; 846 struct dirent *dp; 847 char *last, *vect[1], path[MAXPATHLEN]; 848 849 if (!(dirp = opendir(name))) { 850 run_err("%s: %s", name, strerror(errno)); 851 return; 852 } 853 last = strrchr(name, '/'); 854 if (last == 0) 855 last = name; 856 else 857 last++; 858 if (pflag) { 859 if (do_times(remout, verbose_mode, statp) < 0) { 860 closedir(dirp); 861 return; 862 } 863 } 864 (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n", 865 (u_int) (statp->st_mode & FILEMODEMASK), 0, last); 866 if (verbose_mode) 867 fprintf(stderr, "Entering directory: %s", path); 868 (void) atomicio(vwrite, remout, path, strlen(path)); 869 if (response() < 0) { 870 closedir(dirp); 871 return; 872 } 873 while ((dp = readdir(dirp)) != NULL) { 874 if (dp->d_ino == 0) 875 continue; 876 if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) 877 continue; 878 if (strlen(name) + 1 + strlen(dp->d_name) >= sizeof(path) - 1) { 879 run_err("%s/%s: name too long", name, dp->d_name); 880 continue; 881 } 882 (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name); 883 vect[0] = path; 884 source(1, vect); 885 } 886 (void) closedir(dirp); 887 (void) atomicio(vwrite, remout, __UNCONST("E\n"), 2); 888 (void) response(); 889 } 890 891 void 892 sink(int argc, char **argv) 893 { 894 static BUF buffer; 895 struct stat stb; 896 enum { 897 YES, NO, DISPLAYED 898 } wrerr; 899 BUF *bp; 900 off_t i; 901 size_t j, count; 902 int amt, exists, first, ofd; 903 mode_t mode, omode, mask; 904 off_t size, statbytes; 905 unsigned long long ull; 906 int setimes, targisdir, wrerrno = 0; 907 char ch, *cp, *np, *targ, *vect[1], buf[16384]; 908 const char *why; 909 struct timeval tv[2]; 910 911 #define atime tv[0] 912 #define mtime tv[1] 913 #define SCREWUP(str) { why = str; goto screwup; } 914 915 setimes = targisdir = 0; 916 mask = umask(0); 917 if (!pflag) 918 (void) umask(mask); 919 if (argc != 1) { 920 run_err("ambiguous target"); 921 exit(1); 922 } 923 targ = *argv; 924 if (targetshouldbedirectory) 925 verifydir(targ); 926 927 (void) atomicio(vwrite, remout, empty, 1); 928 if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode)) 929 targisdir = 1; 930 for (first = 1;; first = 0) { 931 cp = buf; 932 if (atomicio(read, remin, cp, 1) != 1) 933 return; 934 if (*cp++ == '\n') 935 SCREWUP("unexpected <newline>"); 936 do { 937 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 938 SCREWUP("lost connection"); 939 *cp++ = ch; 940 } while (cp < &buf[sizeof(buf) - 1] && ch != '\n'); 941 *cp = 0; 942 if (verbose_mode) 943 fprintf(stderr, "Sink: %s", buf); 944 945 if (buf[0] == '\01' || buf[0] == '\02') { 946 if (iamremote == 0) 947 (void) atomicio(vwrite, STDERR_FILENO, 948 buf + 1, strlen(buf + 1)); 949 if (buf[0] == '\02') 950 exit(1); 951 ++errs; 952 continue; 953 } 954 if (buf[0] == 'E') { 955 (void) atomicio(vwrite, remout, empty, 1); 956 return; 957 } 958 if (ch == '\n') 959 *--cp = 0; 960 961 cp = buf; 962 if (*cp == 'T') { 963 setimes++; 964 cp++; 965 if (!isdigit((unsigned char)*cp)) 966 SCREWUP("mtime.sec not present"); 967 ull = strtoull(cp, &cp, 10); 968 if (!cp || *cp++ != ' ') 969 SCREWUP("mtime.sec not delimited"); 970 if ((time_t)ull < 0 || 971 (unsigned long long)(time_t)ull != ull) 972 setimes = 0; /* out of range */ 973 mtime.tv_sec = ull; 974 mtime.tv_usec = strtol(cp, &cp, 10); 975 if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || 976 mtime.tv_usec > 999999) 977 SCREWUP("mtime.usec not delimited"); 978 if (!isdigit((unsigned char)*cp)) 979 SCREWUP("atime.sec not present"); 980 ull = strtoull(cp, &cp, 10); 981 if (!cp || *cp++ != ' ') 982 SCREWUP("atime.sec not delimited"); 983 if ((time_t)ull < 0 || 984 (unsigned long long)(time_t)ull != ull) 985 setimes = 0; /* out of range */ 986 atime.tv_sec = ull; 987 atime.tv_usec = strtol(cp, &cp, 10); 988 if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || 989 atime.tv_usec > 999999) 990 SCREWUP("atime.usec not delimited"); 991 (void) atomicio(vwrite, remout, empty, 1); 992 continue; 993 } 994 if (*cp != 'C' && *cp != 'D') { 995 /* 996 * Check for the case "rcp remote:foo\* local:bar". 997 * In this case, the line "No match." can be returned 998 * by the shell before the rcp command on the remote is 999 * executed so the ^Aerror_message convention isn't 1000 * followed. 1001 */ 1002 if (first) { 1003 run_err("%s", cp); 1004 exit(1); 1005 } 1006 SCREWUP("expected control record"); 1007 } 1008 mode = 0; 1009 for (++cp; cp < buf + 5; cp++) { 1010 if (*cp < '0' || *cp > '7') 1011 SCREWUP("bad mode"); 1012 mode = (mode << 3) | (*cp - '0'); 1013 } 1014 if (*cp++ != ' ') 1015 SCREWUP("mode not delimited"); 1016 1017 for (size = 0; isdigit((unsigned char)*cp);) 1018 size = size * 10 + (*cp++ - '0'); 1019 if (*cp++ != ' ') 1020 SCREWUP("size not delimited"); 1021 if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) { 1022 run_err("error: unexpected filename: %s", cp); 1023 exit(1); 1024 } 1025 if (targisdir) { 1026 static char *namebuf; 1027 static size_t cursize; 1028 size_t need; 1029 1030 need = strlen(targ) + strlen(cp) + 250; 1031 if (need > cursize) { 1032 free(namebuf); 1033 namebuf = xmalloc(need); 1034 cursize = need; 1035 } 1036 (void) snprintf(namebuf, need, "%s%s%s", targ, 1037 strcmp(targ, "/") ? "/" : "", cp); 1038 np = namebuf; 1039 } else 1040 np = targ; 1041 curfile = cp; 1042 exists = stat(np, &stb) == 0; 1043 if (buf[0] == 'D') { 1044 int mod_flag = pflag; 1045 if (!iamrecursive) 1046 SCREWUP("received directory without -r"); 1047 if (exists) { 1048 if (!S_ISDIR(stb.st_mode)) { 1049 errno = ENOTDIR; 1050 goto bad; 1051 } 1052 if (pflag) 1053 (void) chmod(np, mode); 1054 } else { 1055 /* Handle copying from a read-only 1056 directory */ 1057 mod_flag = 1; 1058 if (mkdir(np, mode | S_IRWXU) < 0) 1059 goto bad; 1060 } 1061 vect[0] = xstrdup(np); 1062 sink(1, vect); 1063 if (setimes) { 1064 setimes = 0; 1065 if (utimes(vect[0], tv) < 0) 1066 run_err("%s: set times: %s", 1067 vect[0], strerror(errno)); 1068 } 1069 if (mod_flag) 1070 (void) chmod(vect[0], mode); 1071 free(vect[0]); 1072 continue; 1073 } 1074 omode = mode; 1075 mode |= S_IWUSR; 1076 if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { 1077 bad: run_err("%s: %s", np, strerror(errno)); 1078 continue; 1079 } 1080 (void) atomicio(vwrite, remout, empty, 1); 1081 if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) { 1082 (void) close(ofd); 1083 continue; 1084 } 1085 cp = bp->buf; 1086 wrerr = NO; 1087 1088 statbytes = 0; 1089 if (showprogress) 1090 start_progress_meter(curfile, size, &statbytes); 1091 set_nonblock(remin); 1092 for (count = i = 0; i < size; i += bp->cnt) { 1093 amt = bp->cnt; 1094 if (i + amt > size) 1095 amt = size - i; 1096 count += amt; 1097 do { 1098 j = atomicio6(read, remin, cp, amt, 1099 scpio, &statbytes); 1100 if (j == 0) { 1101 run_err("%s", j != EPIPE ? 1102 strerror(errno) : 1103 "dropped connection"); 1104 exit(1); 1105 } 1106 amt -= j; 1107 cp += j; 1108 } while (amt > 0); 1109 1110 if (count == bp->cnt) { 1111 /* Keep reading so we stay sync'd up. */ 1112 if (wrerr == NO) { 1113 if (atomicio(vwrite, ofd, bp->buf, 1114 count) != count) { 1115 wrerr = YES; 1116 wrerrno = errno; 1117 } 1118 } 1119 count = 0; 1120 cp = bp->buf; 1121 } 1122 } 1123 unset_nonblock(remin); 1124 if (showprogress) 1125 stop_progress_meter(); 1126 if (count != 0 && wrerr == NO && 1127 atomicio(vwrite, ofd, bp->buf, count) != count) { 1128 wrerr = YES; 1129 wrerrno = errno; 1130 } 1131 if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) && 1132 ftruncate(ofd, size) != 0) { 1133 run_err("%s: truncate: %s", np, strerror(errno)); 1134 wrerr = DISPLAYED; 1135 } 1136 if (pflag) { 1137 if (exists || omode != mode) 1138 if (fchmod(ofd, omode)) { 1139 run_err("%s: set mode: %s", 1140 np, strerror(errno)); 1141 wrerr = DISPLAYED; 1142 } 1143 } else { 1144 if (!exists && omode != mode) 1145 if (fchmod(ofd, omode & ~mask)) { 1146 run_err("%s: set mode: %s", 1147 np, strerror(errno)); 1148 wrerr = DISPLAYED; 1149 } 1150 } 1151 if (close(ofd) == -1) { 1152 wrerr = YES; 1153 wrerrno = errno; 1154 } 1155 (void) response(); 1156 if (setimes && wrerr == NO) { 1157 setimes = 0; 1158 if (utimes(np, tv) < 0) { 1159 run_err("%s: set times: %s", 1160 np, strerror(errno)); 1161 wrerr = DISPLAYED; 1162 } 1163 } 1164 switch (wrerr) { 1165 case YES: 1166 run_err("%s: %s", np, strerror(wrerrno)); 1167 break; 1168 case NO: 1169 (void) atomicio(vwrite, remout, empty, 1); 1170 break; 1171 case DISPLAYED: 1172 break; 1173 } 1174 } 1175 screwup: 1176 run_err("protocol error: %s", why); 1177 exit(1); 1178 } 1179 1180 int 1181 response(void) 1182 { 1183 char ch, *cp, resp, rbuf[2048]; 1184 1185 if (atomicio(read, remin, &resp, sizeof(resp)) != sizeof(resp)) 1186 lostconn(0); 1187 1188 cp = rbuf; 1189 switch (resp) { 1190 case 0: /* ok */ 1191 return (0); 1192 default: 1193 *cp++ = resp; 1194 /* FALLTHROUGH */ 1195 case 1: /* error, followed by error msg */ 1196 case 2: /* fatal error, "" */ 1197 do { 1198 if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch)) 1199 lostconn(0); 1200 *cp++ = ch; 1201 } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n'); 1202 1203 if (!iamremote) 1204 (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf); 1205 ++errs; 1206 if (resp == 1) 1207 return (-1); 1208 exit(1); 1209 } 1210 /* NOTREACHED */ 1211 } 1212 1213 void 1214 usage(void) 1215 { 1216 (void) fprintf(stderr, 1217 "usage: scp [-12346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" 1218 " [-l limit] [-o ssh_option] [-P port] [-S program]\n" 1219 " [[user@]host1:]file1 ... [[user@]host2:]file2\n"); 1220 exit(1); 1221 } 1222 1223 void 1224 run_err(const char *fmt,...) 1225 { 1226 static FILE *fp; 1227 va_list ap; 1228 1229 ++errs; 1230 if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) { 1231 (void) fprintf(fp, "%c", 0x01); 1232 (void) fprintf(fp, "scp: "); 1233 va_start(ap, fmt); 1234 (void) vfprintf(fp, fmt, ap); 1235 va_end(ap); 1236 (void) fprintf(fp, "\n"); 1237 (void) fflush(fp); 1238 } 1239 1240 if (!iamremote) { 1241 va_start(ap, fmt); 1242 vfprintf(stderr, fmt, ap); 1243 va_end(ap); 1244 fprintf(stderr, "\n"); 1245 } 1246 } 1247 1248 void 1249 verifydir(char *cp) 1250 { 1251 struct stat stb; 1252 1253 if (!stat(cp, &stb)) { 1254 if (S_ISDIR(stb.st_mode)) 1255 return; 1256 errno = ENOTDIR; 1257 } 1258 run_err("%s: %s", cp, strerror(errno)); 1259 killchild(0); 1260 } 1261 1262 int 1263 okname(char *cp0) 1264 { 1265 int c; 1266 char *cp; 1267 1268 cp = cp0; 1269 do { 1270 c = (int)*cp; 1271 if (c & 0200) 1272 goto bad; 1273 if (!isalpha(c) && !isdigit(c)) { 1274 switch (c) { 1275 case '\'': 1276 case '"': 1277 case '`': 1278 case ' ': 1279 case '#': 1280 goto bad; 1281 default: 1282 break; 1283 } 1284 } 1285 } while (*++cp); 1286 return (1); 1287 1288 bad: fprintf(stderr, "%s: invalid user name\n", cp0); 1289 return (0); 1290 } 1291 1292 BUF * 1293 allocbuf(BUF *bp, int fd, int blksize) 1294 { 1295 size_t size; 1296 struct stat stb; 1297 1298 if (fstat(fd, &stb) < 0) { 1299 run_err("fstat: %s", strerror(errno)); 1300 return (0); 1301 } 1302 size = roundup(stb.st_blksize, blksize); 1303 if (size == 0) 1304 size = blksize; 1305 if (bp->cnt >= size) 1306 return (bp); 1307 if (bp->buf == NULL) 1308 bp->buf = xmalloc(size); 1309 else 1310 bp->buf = xrealloc(bp->buf, 1, size); 1311 memset(bp->buf, 0, size); 1312 bp->cnt = size; 1313 return (bp); 1314 } 1315 1316 static void 1317 lostconn(int signo) 1318 { 1319 if (!iamremote) 1320 (void)write(STDERR_FILENO, "lost connection\n", 16); 1321 if (signo) 1322 _exit(1); 1323 else 1324 exit(1); 1325 } 1326